Bug 116711 - yoga 900 does not reach lower power states
Summary: yoga 900 does not reach lower power states
Status: CLOSED DUPLICATE of bug 116671
Alias: None
Product: Power Management
Classification: Unclassified
Component: Other (show other bugs)
Hardware: Intel Linux
: P1 normal
Assignee: Rafael J. Wysocki
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2016-04-19 16:30 UTC by Kevin Fenzi
Modified: 2016-05-16 21:17 UTC (History)
4 users (show)

See Also:
Kernel Version: 4.6.0-0.rc4
Subsystem:
Regression: No
Bisected commit-id:

Attachments
lspci -vvv (23.71 KB, application/octet-stream)
2016-04-19 16:30 UTC, Kevin Fenzi 		Details
dmesg (73.58 KB, application/octet-stream)
2016-04-19 16:30 UTC, Kevin Fenzi 		Details
Add an attachment (proposed patch, testcase, etc.)

Description Kevin Fenzi 2016-04-19 16:30:37 UTC 
Created attachment 213301 [details]
lspci -vvv

Looking in powertop, I only see % next to:

C2 (pc2)

None of the lower power states seem to ever be more than 0%
Comment 1 Kevin Fenzi 2016-04-19 16:30:58 UTC 
Created attachment 213311 [details]
dmesg
Comment 2 Kevin Fenzi 2016-04-19 16:31:23 UTC 
Happy to provide more info or test patches, etc.
Comment 3 Zhang Rui 2016-04-22 01:19:07 UTC 
what if you change the SATA link_power_management_policy to min_power?
Comment 4 Zhang Rui 2016-04-22 01:22:58 UTC 
(In reply to Zhang Rui from comment #3)
> what if you change the SATA link_power_management_policy to min_power?

you can do this by changing /sys/class/scsi_host/host*/link_power_management_policy to "min_power".
Comment 5 Kevin Fenzi 2016-04-22 20:27:00 UTC 
Ah ha. That does it indeed. ;) 

So, I guess you can close this... sorry for the noise.
Comment 6 Zhang Rui 2016-04-25 23:13:18 UTC 

*** This bug has been marked as a duplicate of bug 116671 ***
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